An old GF's father was in the Home Guard in London, 1940. (He was too old for active duty, and worked in the Hawker aircraft factory.) He described training with No.1Mk.III Enfields (he could still do the Manual of Arms and bayonet drill at age 83), but when they went on "maneuvers" down on the coast he was put on a crew that was armed with jerry-rigged pipe cannons that fired pop bottles filled with gasoline. I forget if they were powered by springs or rubber bands. The idea was to launch the molotov cocktails into German landing craft. He said accuracy and range wasn't the best...
